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Replaced keyboard but still have dysfunctional keys


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csselement

 
Member Since: Oct 18, 2010
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I'm at a loss for understanding this issue and can't seem to find any specific enough information online.

A dear friend accidentally spilled a few drops of liquid on the keyboard. As you would suspect, problems popped up soon afterwards. Some keys work, but the majority of keys either don't work at all, or type characters that don't correspond to the actual key pressed. Also, there's a problem with repeatingggggggggg.

Since then, I've ordered a new keyboard to replace the damaged one (let me tell you, it was quite a procedure). After putting everything back together, I powered up the computer and found the SAME EXACT PROBLEMS! So, I can only guess that it was more than the keyboard that was damaged.

I don't know what all is involved in the transfer from fingertip to successful key entry, so I thought I'd ask here. Is there something else in the line I need to replace? Logically, there must be...I just need some help discovering what that is.

Thanks all!

Update: I tried using an external USB keyboard with the built-in keyboard disconnected. Works fine, but I'd sure like to figure out how to get the built-in keyboard functional.

Update2: After reconnecting the built-in keyboard while the computer was on, more keys worked and the repeating problem was gone. Still missing functionality on many keys though. I'm stumped by this.
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dtravis7

 
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Do you have an external USB keyboard you can try? If so give it a try and report back.
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csselement

 
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Thanks for your reply. Here are 2 things I've tried so far:

Update 1: I tried using an external USB keyboard with the built-in keyboard disconnected. Works fine, but I'd sure like to figure out how to get the built-in keyboard functional.

Update 2: After reconnecting the built-in keyboard while the computer was on, more keys worked and the repeating problem was gone! Still missing functionality on many keys though. I'm stumped by this.
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chscag

 
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Quote:
Update 2: After reconnecting the built-in keyboard while the computer was on, more keys worked and the repeating problem was gone! Still missing functionality on many keys though. I'm stumped by this.
Spills are always more damaging than they appear at first. Having said that, have you checked the keyboard connector and cable? Make sure there is no moisture around those areas. Since the external keyboard works OK, it's likely a cable or connector problem.
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csselement

 
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I think that's the conclusion I've come to.

- It's a completely new board, so it can't be that.
- An external keyboard works fine, so it's not something in the system itself.
- After unplugging and reconnecting the ribbon, the problems changed.

It must be the connector. What's the best way to clean it?
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chscag

 
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You can't really clean the ribbon connector. It may be best to leave everything apart for a length of time and let it dry out real good. (Or, maybe blowing some canned air into it might work.) I remember a few posts in the past with same problem as you're having, and it seems that just letting it all dry out solved it for some. Also replacing the connector isn't really an option without having to swap out the entire logic board. $$$ (And since you have a new keyboard with ribbon cable, it can't be that.)
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